/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-MCR.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d9e330d [2020-02-11 01:17:37,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-11 01:17:37,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-11 01:17:37,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-02-11 01:17:37,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-02-11 01:17:37,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-02-11 01:17:37,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-02-11 01:17:37,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-02-11 01:17:37,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-02-11 01:17:37,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-02-11 01:17:37,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-02-11 01:17:37,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-02-11 01:17:37,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-02-11 01:17:37,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-02-11 01:17:37,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-02-11 01:17:37,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-02-11 01:17:37,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-02-11 01:17:37,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-02-11 01:17:37,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-02-11 01:17:37,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-02-11 01:17:37,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-02-11 01:17:37,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-02-11 01:17:37,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-02-11 01:17:37,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-02-11 01:17:37,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-02-11 01:17:37,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-02-11 01:17:37,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-02-11 01:17:37,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-02-11 01:17:37,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-MCR.epf [2020-02-11 01:17:37,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-11 01:17:37,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-11 01:17:37,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-11 01:17:37,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-11 01:17:37,499 INFO L138 SettingsManager]: * Use SBE=true [2020-02-11 01:17:37,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-11 01:17:37,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-11 01:17:37,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-11 01:17:37,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-11 01:17:37,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-11 01:17:37,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-11 01:17:37,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-11 01:17:37,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-11 01:17:37,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-11 01:17:37,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-11 01:17:37,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-11 01:17:37,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-11 01:17:37,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-11 01:17:37,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-11 01:17:37,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-11 01:17:37,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-11 01:17:37,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-11 01:17:37,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-11 01:17:37,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-02-11 01:17:37,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-02-11 01:17:37,506 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-02-11 01:17:37,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-11 01:17:37,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-11 01:17:37,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-11 01:17:37,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-11 01:17:37,839 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-11 01:17:37,840 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-11 01:17:37,841 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2020-02-11 01:17:37,841 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2020-02-11 01:17:37,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-11 01:17:37,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-11 01:17:37,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-11 01:17:37,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-11 01:17:37,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-11 01:17:37,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-11 01:17:37,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-11 01:17:37,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-11 01:17:37,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-11 01:17:37,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... [2020-02-11 01:17:37,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-11 01:17:37,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-11 01:17:37,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-11 01:17:37,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-11 01:17:37,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-11 01:17:38,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-11 01:17:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-11 01:17:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-11 01:17:38,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-11 01:17:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-11 01:17:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-11 01:17:38,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-11 01:17:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-11 01:17:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-11 01:17:38,023 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-11 01:17:38,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-11 01:17:38,177 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-11 01:17:38,184 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:17:38 BoogieIcfgContainer [2020-02-11 01:17:38,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-11 01:17:38,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-11 01:17:38,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-11 01:17:38,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-11 01:17:38,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:17:37" (1/2) ... [2020-02-11 01:17:38,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd2d9cd and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:17:38, skipping insertion in model container [2020-02-11 01:17:38,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:17:38" (2/2) ... [2020-02-11 01:17:38,196 INFO L109 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2020-02-11 01:17:38,206 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-11 01:17:38,214 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-11 01:17:38,216 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-11 01:17:38,274 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-02-11 01:17:38,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-11 01:17:38,292 INFO L376 AbstractCegarLoop]: Hoare is false [2020-02-11 01:17:38,292 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-11 01:17:38,292 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-02-11 01:17:38,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-11 01:17:38,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-11 01:17:38,292 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-11 01:17:38,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-11 01:17:38,303 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions [2020-02-11 01:17:38,328 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2020-02-11 01:17:38,329 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-11 01:17:38,334 INFO L76 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2020-02-11 01:17:38,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions [2020-02-11 01:17:38,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 11 transitions [2020-02-11 01:17:38,348 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2020-02-11 01:17:38,348 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-02-11 01:17:38,348 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:17:38,349 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:17:38,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:17:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:17:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2113080518, now seen corresponding path program 1 times [2020-02-11 01:17:38,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:17:38,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524350082] [2020-02-11 01:17:38,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:17:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:17:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:17:38,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524350082] [2020-02-11 01:17:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:17:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-11 01:17:38,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [91476268] [2020-02-11 01:17:38,662 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:17:38,674 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:17:38,693 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2020-02-11 01:17:38,693 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:17:38,813 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-02-11 01:17:38,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-02-11 01:17:38,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:17:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-02-11 01:17:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-02-11 01:17:38,836 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 15 [2020-02-11 01:17:38,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions. Second operand 6 states. [2020-02-11 01:17:38,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:17:38,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 15 [2020-02-11 01:17:38,842 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:17:38,959 INFO L129 PetriNetUnfolder]: 3/21 cut-off events. [2020-02-11 01:17:38,959 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2020-02-11 01:17:38,960 INFO L76 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 21 events. 3/21 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 41 event pairs. 2/23 useless extension candidates. Maximal degree in co-relation 24. Up to 6 conditions per place. [2020-02-11 01:17:38,962 INFO L145 encePairwiseOnDemand]: 11/15 looper letters, 3 selfloop transitions, 4 changer transitions 5/16 dead transitions. [2020-02-11 01:17:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-02-11 01:17:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-02-11 01:17:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2020-02-11 01:17:38,968 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-02-11 01:17:38,969 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 60 transitions. [2020-02-11 01:17:38,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 60 transitions. [2020-02-11 01:17:38,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:17:38,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 60 transitions. [2020-02-11 01:17:38,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-02-11 01:17:38,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-02-11 01:17:38,981 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-02-11 01:17:38,983 INFO L178 Difference]: Start difference. First operand has 16 places, 11 transitions. Second operand 6 states and 60 transitions. [2020-02-11 01:17:38,984 INFO L206 Difference]: Finished difference. Result has 22 places, 11 transitions [2020-02-11 01:17:38,987 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=48, PETRI_PLACES=22, PETRI_TRANSITIONS=11} [2020-02-11 01:17:38,988 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 11 transitions [2020-02-11 01:17:38,993 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2020-02-11 01:17:38,993 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-02-11 01:17:38,994 INFO L76 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 0/12 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs. 0/12 useless extension candidates. Maximal degree in co-relation 19. Up to 3 conditions per place. [2020-02-11 01:17:38,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 11 transitions [2020-02-11 01:17:38,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 11 transitions [2020-02-11 01:17:38,996 INFO L479 AbstractCegarLoop]: Abstraction has has 22 places, 11 transitions [2020-02-11 01:17:38,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-02-11 01:17:39,001 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2020-02-11 01:17:39,002 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-02-11 01:17:39,002 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:17:39,002 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:17:39,003 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:17:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:17:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash 281799848, now seen corresponding path program 1 times [2020-02-11 01:17:39,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:17:39,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896003384] [2020-02-11 01:17:39,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:17:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:17:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:17:39,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896003384] [2020-02-11 01:17:39,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:17:39,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-11 01:17:39,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441919014] [2020-02-11 01:17:39,046 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:17:39,047 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:17:39,052 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2020-02-11 01:17:39,052 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:17:39,052 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2020-02-11 01:17:39,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-11 01:17:39,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:17:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-11 01:17:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-11 01:17:39,060 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 15 [2020-02-11 01:17:39,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 11 transitions. Second operand 3 states. [2020-02-11 01:17:39,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:17:39,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 15 [2020-02-11 01:17:39,062 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:17:39,067 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-02-11 01:17:39,068 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-02-11 01:17:39,068 INFO L76 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 9 events. 0/9 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs. 1/10 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2020-02-11 01:17:39,070 INFO L145 encePairwiseOnDemand]: 13/15 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2020-02-11 01:17:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-11 01:17:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-11 01:17:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2020-02-11 01:17:39,073 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2020-02-11 01:17:39,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2020-02-11 01:17:39,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2020-02-11 01:17:39,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:17:39,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2020-02-11 01:17:39,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-11 01:17:39,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-11 01:17:39,077 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-11 01:17:39,077 INFO L178 Difference]: Start difference. First operand has 22 places, 11 transitions. Second operand 3 states and 38 transitions. [2020-02-11 01:17:39,077 INFO L206 Difference]: Finished difference. Result has 24 places, 0 transitions [2020-02-11 01:17:39,078 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2020-02-11 01:17:39,078 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 24 places, 0 transitions [2020-02-11 01:17:39,079 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-11 01:17:39,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-11 01:17:39,079 INFO L76 FinitePrefix]: Finished finitePrefix Result has 6 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-02-11 01:17:39,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 0 transitions [2020-02-11 01:17:39,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions [2020-02-11 01:17:39,085 INFO L479 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions [2020-02-11 01:17:39,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-11 01:17:39,085 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-11 01:17:39,086 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-11 01:17:39,094 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:17:39 BasicIcfg [2020-02-11 01:17:39,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-11 01:17:39,099 INFO L168 Benchmark]: Toolchain (without parser) took 1220.86 ms. Allocated memory was 145.8 MB in the beginning and 174.1 MB in the end (delta: 28.3 MB). Free memory was 119.5 MB in the beginning and 139.7 MB in the end (delta: -20.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 7.1 GB. [2020-02-11 01:17:39,101 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-02-11 01:17:39,103 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.38 ms. Allocated memory is still 145.8 MB. Free memory was 119.3 MB in the beginning and 117.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-11 01:17:39,105 INFO L168 Benchmark]: Boogie Preprocessor took 21.43 ms. Allocated memory is still 145.8 MB. Free memory was 117.6 MB in the beginning and 116.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-02-11 01:17:39,106 INFO L168 Benchmark]: RCFGBuilder took 248.93 ms. Allocated memory is still 145.8 MB. Free memory was 116.6 MB in the beginning and 107.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-02-11 01:17:39,107 INFO L168 Benchmark]: TraceAbstraction took 907.77 ms. Allocated memory was 145.8 MB in the beginning and 174.1 MB in the end (delta: 28.3 MB). Free memory was 106.6 MB in the beginning and 139.7 MB in the end (delta: -33.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-02-11 01:17:39,119 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.38 ms. Allocated memory is still 145.8 MB. Free memory was 119.3 MB in the beginning and 117.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.43 ms. Allocated memory is still 145.8 MB. Free memory was 117.6 MB in the beginning and 116.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.93 ms. Allocated memory is still 145.8 MB. Free memory was 116.6 MB in the beginning and 107.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 907.77 ms. Allocated memory was 145.8 MB in the beginning and 174.1 MB in the end (delta: 28.3 MB). Free memory was 106.6 MB in the beginning and 139.7 MB in the end (delta: -33.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 13 SDslu, 5 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 512 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...